pneumatic device is safe, reliable, low cost, convenient operation and maintenance, is a major branch of valve drive structure. The pneumatic device applied in occasions with explosion-proof requirement more. pneumatic device USES air supply work pressure is low, do not generally greater than zero. 82MPa。 Shoulds not be too great for structure size, and thus the total thrust valve pneumatic device can't be large. A pneumatic device, valves use condition using air pressure 0. 4 to 0. 7 ( MPa） The environmental temperature and medium temperature 5 ~ 60 ( ℃) Piston speed and blade size 10 ~ 500 linear velocity ( mm/s） Electromagnetic control input signal current 4 ~ 20 ma 2, the classification of valve pneumatic Industrial Valves pneumatic device according to its structural characteristics are divided into three types: diaphragm pneumatic device, cylinder or pneumatic device, oscillating pneumatic device. In addition to the pneumatic motor type pneumatic device. Pneumatic device classification film type 1, the film cylinder 2 disc diaphragm, diaphragm (1) (2) the flat diaphragm, spring 3 4, piston cylinder type 1, 2 cylinder (1) single cylinder (2) double cylinder, piston and piston ring (1) O ring (2) J ring (3) U sealing ring (4) the v-shaped sealing ring 3, piston rod 4, manual operating mechanism 5, pneumatic accessories (1) loop system (2) the signal return path (3) air filter (4) pressure reducing valve oil mist detector (5) control reversing Industrial Valves swing 1, block 2, 3, 4, leaf three rotor, stator structure characteristics of pneumatic device structure characteristics of all kinds of pneumatic device type characteristics of the diaphragm short journeys, < 40 mm, compact structure, flexible, without manual institutions cylinder stroke length, buffer mechanism as needed, output enough with double cylinder structure, there are manual and pneumatic switch structure oscillating simple structure, low cost, reciprocating motion into rotary motion directly pneumatic motor type can directly replace the valve electric actuator motor and become a pneumatic device, thus can electric actuator torque control, but the complex structure in this paper, the key word search: more products information
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